In WS 10.4.0372 we keep getting the following java error "java.sql.SQLIntegrityConstraintViolationException: Does anybody have a solution?

The log shows:

 

java.sql.SQLIntegrityConstraintViolationException: [SDL WorldServer][SQLServer JDBC Driver][SQLServer]Violation of PRIMARY KEY constraint 'sessionsPk'. Cannot insert duplicate key in object 'dbo.sessions'. The duplicate key value is (2110750846).

 

WS 10 seems to working fine, but we get this error a few times a day, possibly due to our Astoria Contents, but we haven't been able to isolate the cause.